CAMP PANIC

Double tech

Volcanic activity is believed to have produced millions of tonnes of ash which spread over vast swathes of the world.

Spikes in the ice core for lead proved smelting was taking place to create silver and this coincides with the advent of coin minting which helped revive the economy, according to archaeologist Christopher Loveluck of the University of Nottingham.

Researchers found that a century later in 660AD the silver became the coinage of choice.

Icelandic volcano erupts

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